DRX Parameter Activation Timing for Connection Stability
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Solution Overview
Problem
Changing DRX configuration in wireless communication networks can lead to connection failures due to delays in sending response messages from mobile devices, causing miscommunication and loss of synchronization between the mobile device and the base station.
Innovation Solution
The mobile device postpones activating new DRX parameters until the next DRX on duration, using the previous configuration until a subsequent event such as the expiration of a Time Alignment Timer or successful resynchronization, to ensure seamless transition and reduce the likelihood of connection drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the mobile device immediately applies new DRX parameters upon receiving reconfiguration, then the network can quickly adapt DRX configuration to service requirements, but connection failure risk increases due to timing misalignment between device and network
Solution Approach 1:
The mobile device sends the reconfiguration complete message before actually applying the new DRX parameters. This preliminary action ensures the network is ready to switch to new parameters simultaneously with the device, preventing timing misalignment and connection failures while maintaining fast configuration updates.
2Reliability
If the mobile device delays applying new DRX parameters until after sending reconfiguration complete, then connection reliability improves through synchronized parameter activation, but configuration update time increases
Solution Approach 1:
The device performs the signaling action (sending reconfiguration complete) before the actual parameter application. This reorders operations to overlap the application delay with existing communication delays, achieving synchronization without adding net time loss to the configuration update process.
Solution Approach 2:
The device rushes through the signaling phase by sending the complete message immediately upon receiving parameters, then waits for the natural processing time before applying parameters. This skips the unnecessary delay of waiting for confirmation before starting the parameter transition.
3Reliability
If the mobile device uses the previous DRX configuration during the transition period, then synchronization with the network is maintained, but the new configuration cannot take effect promptly
Solution Approach 1:
The device prepares the new parameters and sends the reconfiguration complete message in advance, allowing the network to prepare simultaneously. The actual parameter application occurs at the next DRX cycle boundary, ensuring both device and network switch together without losing synchronization.
Data Source
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AI summary
Methods and apparatus are described of changing the discontinuous reception (DRX) configuration for a connection between a mobile device (50) and a base station (20) that reduces the likelihood of a dropped connection. A mobile device (50) receives updated configuration parameters for the connection from a base station. A mobile device (50) receives updated configuration parameters for the connection from a base station (20). The mobile device (50) postpones the adoption of the new configuration parameters and continues using previous configuration parameters for the connection after receipt of the new configuration parameters until a subsequent on duration of a DRX cycle has occurred according to the previous configuration. The mobile device (50) applies the updated configuration parameters for the connection in the subsequent on duration. Thereafter, the mobile device (50) turns its receiver on and off in DRX mode according to the new DRX configuration.